Door-lock.



A. NYARY.

v nooa LOCK. APPLICATION FILED MAY l5, 1917.

man@ Jan. 15, 1918.

A mf s j@ lllllllllllltli Sllfittllll@ PATENT tUlldlllillltUlt,

.anrnonr nrazar, or cnrcaeo, runners, Assrenon To PAUL n: Busti, orunicaen,

ILLnors.

:DOOR-LOCK.

Specification of Letters '.Patent.

Patented dan. 15, 1216.

Application filed May 16, 1917. Serial No. 168,920.

mechanism which can be readily applied to members to be locked, andwhich will securely hold the members in locked position and will preventrattling o t such members and of the lock parts.

On the accompanying drawings the above and other features oi' theinvention are illustrated.` In the drawings- Figure 1 is a front view ofthe door lock applied to two members'to he locked together,

Fig. 2 is a sectional view on plane 2-2, Fig. l,

Fig. 3 is a rear View of the locking bar,

Fig. 4 is a front view of the plate to which the locking bar is hinged,

Fig. 5 is a front view ot the latch lug supporting plate,

F ig. 6 is an enlarged sectional view on plane 6-6, Fig. 2, and

Fig, l is a perspective view oi the lock cylinder.

In Figs. 1 and 2 the parts a and Z) may be two hinged doors or only oneof the meinbers may he a door and the other a tramepart, and crepresents a stop vtor the door or doors. On one ot the parts, aY plate10 is secured as by screws 11 and has at its outer end the transversehinge lug 12 to which one end of the locking har B is pivoted by the pin13. This locking har is preferably formed ot sheet metal comprising` thetop 11, the outer end flange 15, and the side flanges 16 and 17, thehinge pin 13 passing through the inner end flange of the side flanges 16and 17. Secured to the other part Z) as by means of screws 18 is a plate19 which has the latch lug 2O riveted or otherwise secured thereto andprovided with the transverse latch notch 21 in its outer side. At theouter end of the locking har a latch plate 22 is held against the topofthe bar by pins 23 and 24 which extend transversely between and aresecured in the side flanges 16 and 17. The front end 25 ot the latchplate deilects rearwardly and between this end 'and the end 15 of thelocking bar isinterposed a compression spring 26 which tends to hold thelatch' plate inwardly with its deflected end 25 against the pin 24. Thislatch plate has the rectangular hole 27 therethrough whose outer edge isot reduced thickness to form a latch tongue 28 tor engaging in the latchnotch 21 o'f the latch lug 2O when the latch plate is held inwardly bythe spring 26. Rigidly secured against the outer tace oi the locking barat its swinging end is a knob 29 having the cylindrical chamber 30therein and through the top of the knob eX- tends the key slot 31 forreceiving a key c, the slot having the central circular enlargement 32in which the neck n oi' the key may turn. ln the chamber k80 is thecylinder 33 which has the dianietral slot 3i extending longitudinallytherethrough from the top to within a short distance :trom the bottom,this slot being adapted to register with the key slot 31 to permitinsertion of the key into the cylinder. Extending eccentrically from thelower end o'f the cylinder is the pin 35 which projects into thetransversely elongated hole 36 through the latch plate so that when thecylinder is turned with the key the latch plate will be shiftedforwardly against the force of spring 26 to release the latch tongue 28from the latch notch 21. l/Vhen the locking bar is swung from openposition against the members a and b to be locked together, the latchtongue 28, whose lower edge is beveled, will slide past the roundedupper edge ot the latch lug and the latch lug will he shifted outwardlyuntil the tongue comes into registration with the latch notch .21whereupon the latch plate will be shifted inwardly7 by the spring 26 tocarry the latch tongue into the latch notch and to lock the locking barto the plate 19 which is secured to the member 7o. To unlock the bar,the key is inserted through the key-hole into the cylinder and then whenthe key is turned, the cylinder will turn therewith and the pin 35engaging in the hole 36 will swing the latch plate outwardly to releasethe hitch tongue from the notch and the locking bar can be swung intoposition at perpendicular with the member o and the door 0r doors arefree to be opened. It will be noted that unless the locking bar is fullyforced down andthe latch plate moved suiiiciently inwardly to permitfull entrance of the latch tongue in the latch notch, the cylinder willnot rotate sufficiently to bring its slot Q9 in coincidence with the keyslot 31, and the key can then be neither inserted nor withdrawn. Thisinsures accurate and complete locking.

The cylinders of different locks may have slots of different depth orthe bottoms of the slots may have different shapes so that differentkeys will be required to open different locks. In the constructionshown, the bottom of the cylinder slot 33 has the conical lridge 37 toreceive the conical notch o in the end of the key. Instead of this, thebase of the cylinder may have a diiferent shape so that only a key witha corresponding end can be inserted to operate the lock. Theslots of thecylinders may also be of different depth so that` only keys of corre-Sponding length can be effectively used. It is evident that moreelaborate key and tumbler mechanism may be used, as for example,cylinder tumbler cylinders and keys.

In order to insure tight closure of the parts a and Z) if these partsare doors, a leaf Vspring 3S is secured against the inner side of thelock bar top 14 to engage and press at its ends against the plates 10and 19 when the locking bar is closed in order to firmly press and holdthe members a and b against the stop c. If the parta is a stationaryframe and the part Z) the door, then a spring may be provided forengaging only lagainst the plate 19. Such spring will also serve toautomatically swing out the locking bar when the key is turned torelease the latch plate from the latch lug, and then the bar can bereadily grasped and swung the full distance to permit opening` of thedoor or doors. The spring also serves to make the lock rigid when closedand to prevent rattling or vibration thereof, irrespective of anywearlof the latching members or loosetess thereof.

The lock mechanism which I' have described is of simple, inexpensiveconstruction, yet very efficient. The locking bar body 14 confines andprotects the latching parts whether the bar is in open or closedposition,

and there being a special key for each lock, opening of the lock isimpossible without the right key. Although the lock may be used in agreat many ways it is particularly adaptable for locking the doors ofcommercial vehicles. v

I do not, of course, desire to be limited to the exact construction,arrangement and operation disclosed as changes and modifications are nodoubt possible which would still come within the scope of the invention.

Copies of this patent may be obtained for ive cents each, by addressingthe Y Washington, D. C.

cured to a member to be locked and having Y a latching lug extendingtherefrom to be received by the locking bar when said bar isswungagainst the member to be locked, pins extending transversely throughsaid locking bar, a latch plate conined in said locking bar between thetop of said bar and said pins, said latching lug having a latching notchand said latching plate having a latching edge, a spring tending toshift said latching plate to force the latching edge into said latchingnotch when the locking bar is swung against the .member to be locked,said latching plate having a hole, a knob rigidly secured to the lockingbar over said latching plate, aV lock cylinder rotatable in said knoband havinga pin extending eccentrically from its lower end into saidlatching plate hole, said knob having a key hole and said lockcylinderhaving a notch il. Lock mechanism comprising aV plate secured to asupport, a locking bar having inclosing top and side walls, said barbeing hinged at one end to said plate, a plate secured to a member to belocked and havf ing a latching lug Aextending therefrom to be receivedby the locking bar when said bar is swung against the member to belocked, pins extending transversely through said locking bar, a latchplate confined in said locking bar between the top ofsaid barV and saidpins, said latching lug having a latching notch and said latching platehaving a latching edge, a spring tending to shift said latching plate toforce Vthe latching edge into said latching notch when the locking baris swung against the member to be locked, said latching plate having ahole, a knob rigidly secured to thelocking bar over said latching plate,a lock cylinder rotatable in said knob and Vhaving a pin extendingeccentrically from its lower end into said latching plate hole, saidknob having a key hole and said lock cylinder having a notch adapted toregister with said key hole when said-locking bar is locked to said lug,a key for said lock cylinder, and a spring within` and secured tothe topwall of said locking bar andV adapted to engage with and press againstthe member to be locked when said locking bar is in locked position.

In witness whereof I hereunto subscribe ANTHONY N YARY.'

Goinmissionei' of Patents,

